|
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - 068random.mu</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #aaaaaa; background-color: #080808; }
body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; }
a { color:#eeeeee; text-decoration: none; }
a:hover { text-decoration: underline; }
* { font-size: 12pt; font-size: 1em; }
.muRecipe { color: #ff8700; }
.muScenario { color: #00af00; }
.muControl { color: #c0a020; }
.Delimiter { color: #800080; }
.Special { color: #c00000; }
.Comment { color: #9090ff; }
.Comment a { color:#0000ee; text-decoration:underline; }
.Constant { color: #00a0a0; }
.LineNr { color: #444444; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="muRecipe">def</span> <a href='068random.mu.html#L1'>random</a> generator:&:<a href='066stream.mu.html#L2'>stream</a>:num<span class="muRecipe"> -> </span>result:num, fail?:bool, generator:&:<a href='066stream.mu.html#L2'>stream</a>:num [
<span id="L2" class="LineNr"> 2 </span> <span class="Constant">local-scope</span>
<span id="L3" class="LineNr"> 3 </span> <span class="Constant">load-inputs</span>
<span id="L4" class="LineNr"> 4 </span> <span class="Delimiter">{</span>
<span id="L5" class="LineNr"> 5 </span> <span class="muControl">break-if</span> generator
<span id="L6" class="LineNr"> 6 </span> <span class="Comment"># generator is 0? use real random-number generator</span>
<span id="L7" class="LineNr"> 7 </span> result <span class="Special"><-</span> real-random
<span id="L8" class="LineNr"> 8 </span> <span class="muControl"> return</span> result, <span class="Constant">0/false</span>
<span id="L9" class="LineNr"> 9 </span> <span class="Delimiter">}</span>
<span id="L10" class="LineNr">10 </span> result, fail?, generator <span class="Special"><-</span> read generator
<span id="L11" class="LineNr">11 </span>]
<span id="L12" class="LineNr">12 </span>
<span id="L13" class="LineNr">13 </span><span class="Comment"># helper for tests</span>
<span id="L14" class="LineNr">14 </span><span class="muRecipe">def</span> <a href='068random.mu.html#L14'>assume-random-numbers</a><span class="muRecipe"> -> </span>result:&:<a href='066stream.mu.html#L2'>stream</a>:num [
<span id="L15" class="LineNr">15 </span> <span class="Constant">local-scope</span>
<span id="L16" class="LineNr">16 </span> <span class="Constant">load-inputs</span>
<span id="L17" class="LineNr">17 </span> <span class="Comment"># compute result-len, space to allocate in result</span>
<span id="L18" class="LineNr">18 </span> result-len:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L19" class="LineNr">19 </span> <span class="Delimiter">{</span>
<span id="L20" class="LineNr">20 </span> _, arg-received?:bool <span class="Special"><-</span> <span class="Constant">next-input</span>
<span id="L21" class="LineNr">21 </span> <span class="muControl">break-unless</span> arg-received?
<span id="L22" class="LineNr">22 </span> result-len <span class="Special"><-</span> add result-len,<span class="Constant"> 1</span>
<span id="L23" class="LineNr">23 </span> <span class="muControl"> loop</span>
<span id="L24" class="LineNr">24 </span> <span class="Delimiter">}</span>
<span id="L25" class="LineNr">25 </span> <span class="Constant">rewind-inputs</span>
<span id="L26" class="LineNr">26 </span> result-data:&:@:num <span class="Special"><-</span> new <span class="Constant">number:type</span>, result-len
<span id="L27" class="LineNr">27 </span> idx:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L28" class="LineNr">28 </span> <span class="Delimiter">{</span>
<span id="L29" class="LineNr">29 </span> curr:num, arg-received?:bool <span class="Special"><-</span> <span class="Constant">next-input</span>
<span id="L30" class="LineNr">30 </span> <span class="muControl">break-unless</span> arg-received?
<span id="L31" class="LineNr">31 </span> *result-data <span class="Special"><-</span> put-index *result-data, idx, curr
<span id="L32" class="LineNr">32 </span> idx <span class="Special"><-</span> add idx,<span class="Constant"> 1</span>
<span id="L33" class="LineNr">33 </span> <span class="muControl"> loop</span>
<span id="L34" class="LineNr">34 </span> <span class="Delimiter">}</span>
<span id="L35" class="LineNr">35 </span> result <span class="Special"><-</span> <a href='066stream.mu.html#L7'>new-stream</a> result-data
<span id="L36" class="LineNr">36 </span>]
<span id="L37" class="LineNr">37 </span>
<span id="L38" class="LineNr">38 </span><span class="muScenario">scenario</span> random-numbers-in-scenario [
<span id="L39" class="LineNr">39 </span> <span class="Constant">local-scope</span>
<span id="L40" class="LineNr">40 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='066stream.mu.html#L2'>stream</a>:num <span class="Special"><-</span> <a href='068random.mu.html#L14'>assume-random-numbers</a><span class="Constant"> 34</span>,<span class="Constant"> 35</span>,<span class="Constant"> 37</span>
<span id="L41" class="LineNr">41 </span> 1:num/<span class="Special">raw</span>, 2:bool/<span class="Special">raw</span> <span class="Special"><-</span> <a href='068random.mu.html#L1'>random</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L42" class="LineNr">42 </span> 3:num/<span class="Special">raw</span>, 4:bool/<span class="Special">raw</span> <span class="Special"><-</span> <a href='068random.mu.html#L1'>random</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L43" class="LineNr">43 </span> 5:num/<span class="Special">raw</span>, 6:bool/<span class="Special">raw</span> <span class="Special"><-</span> <a href='068random.mu.html#L1'>random</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L44" class="LineNr">44 </span> 7:num/<span class="Special">raw</span>, 8:bool/<span class="Special">raw</span> <span class="Special"><-</span> <a href='068random.mu.html#L1'>random</a> <a href='075channel.mu.html#L36'>source</a>
<span id="L45" class="LineNr">45 </span> memory-should-contain [
<span id="L46" class="LineNr">46 </span> <span class="Constant"> 1</span> <span class="Special"><-</span><span class="Constant"> 34</span>
<span id="L47" class="LineNr">47 </span> <span class="Constant"> 2</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># everything went well</span>
<span id="L48" class="LineNr">48 </span> <span class="Constant"> 3</span> <span class="Special"><-</span><span class="Constant"> 35</span>
<span id="L49" class="LineNr">49 </span> <span class="Constant"> 4</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># everything went well</span>
<span id="L50" class="LineNr">50 </span> <span class="Constant"> 5</span> <span class="Special"><-</span><span class="Constant"> 37</span>
<span id="L51" class="LineNr">51 </span> <span class="Constant"> 6</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># everything went well</span>
<span id="L52" class="LineNr">52 </span> <span class="Constant"> 7</span> <span class="Special"><-</span><span class="Constant"> 0</span> <span class="Comment"># empty result</span>
<span id="L53" class="LineNr">53 </span> <span class="Constant"> 8</span> <span class="Special"><-</span><span class="Constant"> 1</span> <span class="Comment"># end of stream</span>
<span id="L54" class="LineNr">54 </span> ]
<span id="L55" class="LineNr">55 </span>]
<span id="L56" class="LineNr">56 </span>
<span id="L57" class="LineNr">57 </span><span class="Comment"># generate a random integer in the semi-open interval [start, end)</span>
<span id="L58" class="LineNr">58 </span><span class="muRecipe">def</span> <a href='068random.mu.html#L58'>random-in-range</a> generator:&:<a href='066stream.mu.html#L2'>stream</a>:num, start:num, end:num<span class="muRecipe"> -> </span>result:num, fail?:bool, generator:&:<a href='066stream.mu.html#L2'>stream</a>:num [
<span id="L59" class="LineNr">59 </span> <span class="Constant">local-scope</span>
<span id="L60" class="LineNr">60 </span> <span class="Constant">load-inputs</span>
<span id="L61" class="LineNr">61 </span> result, fail?, generator <span class="Special"><-</span> <a href='068random.mu.html#L1'>random</a> generator
<span id="L62" class="LineNr">62 </span> <span class="muControl">return-if</span> fail?
<span id="L63" class="LineNr">63 </span> delta:num <span class="Special"><-</span> subtract end, start
<span id="L64" class="LineNr">64 </span> _, result <span class="Special"><-</span> divide-with-remainder result, delta
<span id="L65" class="LineNr">65 </span> result <span class="Special"><-</span> add result, start
<span id="L66" class="LineNr">66 </span>]
<span id="L67" class="LineNr">67 </span>
<span id="L68" class="LineNr">68 </span><span class="muScenario">scenario</span> <a href='068random.mu.html#L58'>random-in-range</a> [
<span id="L69" class="LineNr">69 </span> <span class="Constant">local-scope</span>
<span id="L70" class="LineNr">70 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='066stream.mu.html#L2'>stream</a>:num <span class="Special"><-</span> <a href='068random.mu.html#L14'>assume-random-numbers</a><span class="Constant"> 91</span>
<span id="L71" class="LineNr">71 </span> 1:num/<span class="Special">raw</span> <span class="Special"><-</span> <a href='068random.mu.html#L58'>random-in-range</a> <a href='075channel.mu.html#L36'>source</a>,<span class="Constant"> 40</span>,<span class="Constant"> 50</span>
<span id="L72" class="LineNr">72 </span> memory-should-contain [
<span id="L73" class="LineNr">73 </span> <span class="Constant"> 1</span> <span class="Special"><-</span><span class="Constant"> 41</span>
<span id="L74" class="LineNr">74 </span> ]
<span id="L75" class="LineNr">75 </span>]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|